8. How fast does water flow from a hole at the bottom of a very wide 4.6m deep storage tank filled with water? Ignore viscosity. (3marks) 9. A 6.0cm diameter horizontal pipe gradually narrows to 4.0cm. When water flows through this pipe at a certain rate, that gauge pressure in this two section is 32.0kPa and 24.0kPa respectively. What is the volume rate of flow? (3marks) 10. What gauge pressure in the water mains is necessary if a fire hose is to spray water to a height of 15.0m? (3marks)